I really like fluoro tippets for some of my fishing, although it is $$$! I think it works well for trout leaders when fishing waters that get pounded pretty hard, like the Yakima, Rocky Ford. I think it really is harder for the fish to see. The stuff is pretty strong for it's diameter, so you can sometimes go with a heavier tippet than you could with other tippet materials. For my trout leaders, I use Maxima ultragreen for the butt and taper and Orvis fluoro for the tippet and it's worked great for a couple of seasons now. Like Salmo g, I LOVE Maxima ultragreen for steelhead! I think it should have its own religion, as I know many steelheaders worship it. I think it's totally justified. Fisherman have been swearing by this stuff before I was born, and you just can't ignore that kind of loyalty. We'll see if fluoro is as big of a deal 25 years from now...

Salmo g: Have you read "My Story as Told by Water" by David James Duncan? There's a funny short story in there about Duncan buying a fishing buddy some fluorocarbon leader material for his birthday, followed by his friends' reaction when he receives it. Great book for a lot of reasons, but that story seems appropriate